my 1990 t16s wont start when the engine is warm. when i turn the key the fuel pump switches on, the engine check light flashes on and off,aloud clicking can be heard from the fuel pressure regulator and the ecu..the engine wont start for 15ish mins and then will start fine.if i try to start the engine while the check engine light is on it will fire then idle erratically then stall. please help!